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StopTech - Slotted and Zinc Plated Aero-Rotor Kit Front (81.838.9931)

Disc Brake Upgrade Kit



You save: $28.35 (3%) off MSRP


Ships Directly from Manufacturer
Select your vehicle to confirm fitment:

This part fits

  1. 2015 Subaru WRX STI
  2. 2014 Subaru WRX STI
  3. 2013 Subaru WRX STI
  4. 2012 Subaru Impreza WRX STI
  5. 2012 Subaru Impreza WRX STI Limited
  6. 2011 Subaru Impreza WRX STI
  7. 2011 Subaru Impreza WRX STI Limited
  8. 2010 Subaru Impreza WRX STI
  9. 2009 Subaru Impreza WRX STI
  10. 2008 Subaru Impreza WRX STI
  11. 2007 Subaru Impreza WRX STI Limited
  12. 2007 Subaru Impreza WRX STI
  13. 2006 Subaru Impreza WRX STI
  14. 2005 Subaru Impreza WRX STI
  15. show all...
Authorized Dealer

About this product

Part #: 81.838.9931

StopTech AeroRotor Replacement Kits ARK are designed to replace your vehicle's original factory rotors, while retaining the factory brake calipers. Although the ARK is the same diameter and thickness as the factory rotors, it offers improved cooling, braking, and handling. The directional, floating AeroRotors allow independent expansion of the rotor and hat without "coning," thanks to elongated drive pin holes. ARK components include AeroRotor friction rings with patented internal vane design, pre-assembled to billet aluminum AeroHats with directional stand-offs that optimize cooling airflow. The patented AeroRotor vane design pushes up to 80 percent more air than factory rotors for better cooling and reduced fade on the track. The aircraft-grade aluminum hats and 2-piece AeroRotors are up to 8 pounds lighter than stock rotors, allowing faster acceleration and deceleration, and improved handling. StopTech AeroRotors are available slotted or cross-drilled. These slots or holes allow better dissipation of heat, friction material and debris, assuring that fresh pad material is in contact with the rotor every time the brakes are applied. An optional anti-corrosion, zinc finish is available for customers in cold climates, where salt and chemicals are used to melt snow and ice. The zinc coating also benefits customers who prefer no visible surface rust on the vanes and outer circumference of the rotors. StopTech AeroRotors are 100 percent made in the USA.

More Details

See what our community says about stoptech products

What made you choose this particular product?
Good reviews from prior buyers
Is this your first time buying from this brand? Did you consider other brands?
View on DAVID's build
What made you choose this particular product?
Great online reviews, easy installation, price, etc.
Is this your first time buying from this brand? Did you consider other brands?
View on Dan's build
What made you choose this particular product?
More bite than the cheap metallic pads I had, resistant to fade
Is this your first time buying from this brand? Did you consider other brands?
No, Cheaper than hawk and EBC
View on Trevor's build
What made you choose this particular product?
Awesome performance, helps the car a lot.
Is this your first time buying from this brand? Did you consider other brands?
View on Dylan's build
Josh Taylor


Josh Taylor
2008 BMW M3
What made you choose this particular product?
It came recommended by many users of the StopTech ST60 kit and is known for its great street manners and low dust while still being capable of autocross and light track use.
Is this your first time buying from this brand? Did you consider other brands?
This was my first time buying StopTech components. I considered other brands but the feedback from owners sold me.
Once you've had a chance to use the product, did it meet your expectations?
These pads are pretty low dust, so that's a plus even though I don't generally care too much for keeping the car clean. They really shine when you get on the brakes and that's what matters. I had no concern at the last autocross. Bite is great and release is smooth.
View on Josh's build
WARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

Benefits of adding this mod

How could you possibly enjoy all that tire shredding torque if you can’t stop? A good set of high performance pads, calipers, and rotors are arguably the most important upgrades you can make for a balanced, high performance build. Consistent performance across all operating conditions and reduced stopping distances result in significantly improved track times and a better daily-driver experience. Whatever your goal, we have all the brake parts you’ll need to build your dream ride (and make sure it stops).


we ship worldwide!

Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

+ always free shipping in the U.S.
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Matt Farah

Smoking Tire / The Drive

Thank you for all the help, really. You guys are awesome. This is all great info and I really appreciate everything you have done to help me with my build.

James M.

Ford Focus ST

Your customer service is wonderful. Thank you for taking care of this. My review will express all. Thank you!

Wallace R

Chevrolet Silverado 1500